When oil and water are mixed vigorously, the oil is broken up into tiny droplets that are dispersed throughout the water. This dispersed mixture is a(n)
A) bile mixture.
B) emulsion.
C) lipoprotein.
D) organophosphate.
Question 2
In positron emission tomography (PET), a positron collides with an electron and the two particles disappear in a burst of
A) an alpha particle and a gamma ray.
B) two beta particles.
C) a neutron and an alpha particle.
D) two gamma rays.